Add isPausedWorker command to Runtime and use it to auto attach DevTools to ServiceWorker.

Source/devtools/protocol.json

 {
     "version": { "major": "1", "minor": "1" },
     "domains": [{
         "domain": "Inspector",
         "hidden": true,
         "types": [],
         "commands": [
             {
                 "name": "enable",
                 "description": "Enables inspector domain notifications."
@@ skipping 804 matching lines @@
                 "description": "Tells inspected instance(worker or page) that it can run in case it was started paused."
             },
             {
                 "name": "enable",
                 "description": "Enables reporting of execution contexts creation by means of <code>executionContextCreated</code> event. When the reporting gets enabled the event will be sent immediately for each existing execution context."
             },
             {
                 "name": "disable",
                 "hidden": true,
                 "description": "Disables reporting of execution contexts creation."
+            },
+            {
+                "name": "isRunRequired",
+                "returns": [
+                    { "name": "result", "type": "boolean", "description": "True if the Runtime is in paused on start state." }
+                ],
+                "hidden": true
             }
         ],
         "events": [
             {
                 "name": "executionContextCreated",
                 "parameters": [
                     { "name": "context", "$ref": "ExecutionContextDescription", "description": "A newly created execution contex." }
                 ],
                 "description": "Issued when new execution context is created."
             },
@@ skipping 3295 matching lines @@
             {
                 "name": "dataAvailable",
                 "parameters": [
                     {"name": "value", "type": "array", "items": { "$ref": "PowerEvent" }, "description": "List of power events." }
                 ],
                 "handlers": ["browser", "frontend"]
             }
         ]
     }]
 }